STMicroelectronics LMV393IST

Overview

LMV393IST from STMicroelectronics is a dual low-voltage rail-to-rail input comparator with open-drain outputs, designed for space-constrained portable systems. It operates from 2.7 V to 5.0 V, draws only 20 µA supply current per channel at 25°C, features 200 ns propagation delay (high-to-low), supports -40°C to +125°C operation, and includes ground-sensing input common-mode range - enabling use in battery-supplied voltage monitoring circuits.

For engineers reviewing the LMV393IST datasheet, LMV393IST pinout, LMV393IST application, or LMV393IST equivalent, key selection considerations include its dual-channel open-drain topology, low quiescent current across full temperature range, input offset voltage ≤7 mV, output sink capability up to 47 mA, and MiniSO-8 package compatibility with high-density PCB layouts.

Technical Context

The LMV393IST implements two independent voltage comparators with rail-to-rail input stages that accept signals down to ground (VCC−), making it suitable for single-supply detection of near-zero thresholds. Its open-drain outputs require external pull-up resistors and support wired-OR logic and level translation across voltage domains.

Internal design targets ultra-low power without sacrificing speed: propagation delay remains ≤275 ns (TPHL) at 5 V with 100 mV overdrive, while input bias current stays below 400 nA over -40°C to +125°C - critical for high-impedance sensor interface applications.

Key Specifications

Pinout & Package

LMV393IST is housed in a MiniSO-8 (also known as MSOP-8 or SO-8 narrow) surface-mount package measuring 3.0 mm × 3.0 mm × 0.85 mm, optimized for high-density portable PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-voltage comparator applications.

Compared with LMV393IDT, LMV393IST saves >50% PCB area while maintaining identical performance; versus TLV393DR, it delivers 40% faster propagation delay at only 40× higher supply current - favoring speed-critical industrial monitoring over extreme energy efficiency.

Availability

LMV393IST is available at Aetrix Electronics and suitable for battery-powered electronics, portable medical devices, and industrial sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LMV393IST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, power management devices, and MEMS sensors for industrial, automotive, and consumer markets.

The LMV3xx series belongs to ST's general-purpose analog comparators product line, engineered specifically for low-voltage, low-power portable and battery-operated applications where space, energy efficiency, and wide temperature operation are critical.

FAQ

What is the maximum sink current capability of LMV393IST at 3.3 V supply?

At VCC = 3.3 V and Tamb = 25°C, LMV393IST guarantees a minimum output sink current of 10 mA with VOL ≤ 400 mV (per Table 4, ISINK test condition VOUT < 1.5 V). This is sufficient to drive standard logic inputs or small LEDs directly without external buffering.

Can LMV393IST operate with a 1.8 V supply?

No. The absolute minimum supply voltage is 2.7 V per the Absolute Maximum Ratings table and Operating Conditions section. At 1.8 V, internal biasing fails and propagation delay becomes undefined; ST does not characterize or guarantee functionality below 2.7 V.

Does LMV393IST require external hysteresis for stable switching?

Yes - like all comparators without built-in hysteresis, LMV393IST benefits from externally added positive feedback (e.g., resistor from output to non-inverting input) when comparing noisy or slowly varying signals. Its low input bias current (≤400 nA) simplifies hysteresis resistor selection without significant error.

Is the MiniSO-8 package of LMV393IST RoHS and REACH compliant?

Yes. Per ST's ECOPACK documentation referenced in Section 4 of the datasheet, LMV393IST uses an ECOPACK2-compliant MiniSO-8 package - lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006.